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AI drafting for civil and site

AI Drafting for Civil and Site Engineering

Site civil sets carry a lot of drafting that follows decisions the engineer already made: stall striping, accessible route callouts, pipe labels with sizes and inverts, and pages of standard details copied from the city's detail book. Nomic drafts the site plan, site utility plan, and detail sheets as DWG files from your engineer's design, then checks them against the ADA Standards and the local agency standards. Grading design and stormwater calculations stay with your engineer.

Start for freeAll drafting work
Last reviewed: November 2026

You send

  • Survey and existing conditions base as DWG
  • Architectural site plan and building footprint
  • The engineer's design markups, criteria, and grading
  • Local agency standard details and the ADA and fire code editions

Nomic hands back

  • Site plans, site utility plans, and detail sheets as DWG files
  • Parking tabulation and structure tables in Excel and on the sheet
  • Plotted PDFs with every drawn change clouded
  • Open questions for the engineer of record, including grades that miss the standard
420416412PROPOSED BUILDINGFFE 418.50WWSMH-1RIM 412.30SMH-2RIM 410.85SMH-3RIM 409.12CBCBPROPERTY LINE8" PVC SAN @ 0.50%1ASITE PLANSCALE: 1" = 30'-0"N1234CONSULTING ENGINEERSREVISIONS1ISSUED FOR REVIEWPROJECTRIVERSIDE HOTELSCALE1" = 30'-0"DATE07/13/2026KEY PLANSHEET TITLESITE PLANSHEET NUMBERC-101

On the sheet

Site Plan, annotated

A civil site plan with contours, the property line, parking, and utilities connecting to the building.

  1. 1Property line
  2. 2Sanitary sewer with manhole rim elevations
  3. 3Water service and storm drain
  4. 4Existing contours with elevations

The problem

Site sheets get redrawn every time the building moves

The architect shifts the building footprint four feet, and the parking count, the accessible stall locations, the fire lane, and every utility service connection have to be redrawn. A commercial pad site can carry 140 stalls, a dozen curb ramps, and sanitary, water, storm, gas, and electric services that all have to line up with the plumbing entry on the architectural plan and the utility company's transformer pad.

The details are their own job. Each city and water district publishes its own standard details for curb ramps, hydrant assemblies, manholes, and service taps, and the agency reviewer will return a set that shows last cycle's detail or the neighboring city's. Someone has to pull the current book, place each detail in house style, and confirm that every callout on the utility plan points at a detail that is actually on the set.

01 / Site plan

Site layout drafted from the engineer's design

Attach the survey, the architectural site background, and the engineer's design markup or criteria memo. Nomic draws curb lines, stalls, striping, sidewalks, and accessible routes on your layers, dimensions them, and fills in the parking tabulation from what it drew.

  • Stalls, drive aisles, and striping dimensioned to your criteria
  • Accessible stalls, access aisles, and the route to the entrance called out
  • Fire apparatus access widths and turnarounds dimensioned for the fire marshal
02 / Utilities and details

Utility plans and agency details in the current edition

Nomic draws the water, sanitary, and storm services from the engineer's design and labels pipe size, material, slope, and inverts with the engineer's numbers. It places the local agency's current standard details on the detail sheets in your house style, and checks that every callout on the utility plan points at a detail on the set.

  • Pipe labels, structure tables, and service connection callouts
  • Agency standard details from the current published book
  • Crossing and separation callouts between water and sewer lines
03 / Check

Checked against ADA and agency standards before plan review

Nomic checks the site sheets against the 2010 ADA Standards, the fire code edition you name, and the agency standards for the jurisdiction. Slopes and elevations are checked against the engineer's grading and left as designed, and anything that does not meet the standard goes back to the engineer as an open question.

  • Accessible stall counts, dimensions, and access aisle slopes
  • Curb ramp slopes and landings against the engineer's spot grades
  • Water and sewer separation and pipe cover against agency rules

Checked against

The code and documents behind every sheet

Name the editions the project is designed to and Nomic checks its own drawing against them before handing it back. Your engineer or architect of record makes the final call and stamps the set.

  • 2010 ADA Standards for Accessible Design
  • International Fire Code Chapter 5 and Appendix D
  • Local agency and utility standard details
  • Ten States Standards for water and wastewater
  • Your firm CAD standards

How it works

From a sentence to a stamped set

  1. Step 1

    Ask for the drawing

    Say what the sheet needs to show and attach the backgrounds, markups, cutsheets, or photos. A sentence is enough to start.

  2. Step 2

    Nomic drafts it in CAD

    Nomic works in CAD on its own computer, on your layers and blocks, following how your firm drew the same thing before. It saves real DWG files to the project.

  3. Step 3

    Nomic checks its own work

    The drawing is checked against the code editions you name and the source documents. Everything Nomic drew is clouded, and open questions are listed.

  4. Step 4

    Your team reviews and stamps

    Your engineers and architects review the clouded changes, make the final call, and issue the set under their own stamp.

FAQ

Frequently asked questions

Yes. Nomic works in CAD on its own computer and saves DWG files for site plans, site utility plans, and detail sheets. It drafts from the survey, the architectural background, and your engineer's design, then checks the sheets against the ADA Standards and the agency standards you name.

No. Grading design, drainage design, and stormwater calculations stay with your civil engineer. Nomic drafts from the engineer's grades and design, and checks slopes and elevations against ADA and the agency standards so the engineer sees which spots miss before the set goes to plan review.

Nomic is not a plugin for Civil 3D, AutoCAD, or any other CAD program. It saves DWG files your team opens in AutoCAD, Civil 3D, or any DWG editor. Surfaces, alignments, and pipe networks stay in your team's Civil 3D models.

Yes. Attach the agency's current detail book or the details as DWG or PDF, and Nomic places them on the detail sheets in your house style. It flags a detail on the set that does not match the current edition and any callout that points at a detail the set does not include.

The 2010 ADA Standards set the number of accessible and van accessible stalls in Section 208, stall and access aisle dimensions and slopes in Section 502, accessible routes from site arrival points in Section 206.2.1, and ramp and curb ramp slopes in Sections 405 and 406. Your state or city may add its own requirements on top.

Keep reading

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AI for civil engineering

Drafting, drawing review, and code checks for civil and site teams.

What is a site plan?

The drawing that locates the building, parking, and utilities on the lot.

What is a grading plan?

Spot grades, contours, and drainage set by the civil engineer.

AI Civil Drafting: Site Plans and Utility Plans as DWGs | Nomic